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diff --git a/lib/mapValuesSeries.js b/lib/mapValuesSeries.js
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+import mapValuesLimit from './mapValuesLimit';
+import doLimit from './internal/doLimit';
+
+/**
+ * The same as `mapValues` but runs only a single async operation at a time.
+ *
+ * @name mapValuesSeries
+ * @static
+ * @memberOf async
+ * @see async.mapValues
+ * @category Collection
+ * @param {Object} obj - A collection to iterate over.
+ * @param {Function} iteratee - A function to apply to each value in `obj`.
+ * The iteratee is passed a `callback(err, transformed)` which must be called
+ * once it has completed with an error (which can be `null`) and a
+ * transformed value. Invoked with (value, key, callback).
+ * @param {Function} [callback] - A callback which is called when all `iteratee`
+ * functions have finished, or an error occurs. Result is an object of the
+ * transformed values from the `obj`. Invoked with (err, result).
+ */
+export default doLimit(mapValuesLimit, 1);